On a Problem for Isometric Mappings of S Posed by Th. M. Rassias
نویسندگان
چکیده
In this article we prove the problem on isometric mappings of S posed by Th. M. Rassias. We prove that any map f : S → S, p ≥ n > 1, preserving two angles θ and mθ (mθ < π, m > 1) is an isometry. With the assumption of continuity we prove that any map f : S → S preserving an irrational angle is an isometry.
منابع مشابه
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